added fabric mod

mod/src/client/java/com/xeovalyte/polarcraft/ExampleModClient.java

@@ -0,0 +1,10 @@
+package com.xeovalyte.polarcraft;
+
+import net.fabricmc.api.ClientModInitializer;
+
+public class ExampleModClient implements ClientModInitializer {
+    @Override
+    public void onInitializeClient() {
+        // This entrypoint is suitable for setting up client-specific logic, such as rendering.
+    }
+}

mod/src/client/java/com/xeovalyte/polarcraft/mixin/client/ExampleClientMixin.java

@@ -0,0 +1,15 @@
+package com.xeovalyte.polarcraft.mixin.client;
+
+import net.minecraft.client.MinecraftClient;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+@Mixin(MinecraftClient.class)
+public class ExampleClientMixin {
+	@Inject(at = @At("HEAD"), method = "run")
+	private void run(CallbackInfo info) {
+		// This code is injected into the start of MinecraftClient.run()V
+	}
+}

mod/src/client/resources/polarcraft-mod.client.mixins.json

@@ -0,0 +1,11 @@
+{
+	"required": true,
+	"package": "com.xeovalyte.polarcraft.mixin.client",
+	"compatibilityLevel": "JAVA_17",
+	"client": [
+		"ExampleClientMixin"
+	],
+	"injectors": {
+		"defaultRequire": 1
+	}
+}